Siemens 3RT1054-1SP36 Power Contactor, 115A, 55kW, SIRIUS 3RT, AC/DC Electronic Drive Original Brand New

Overview

The Siemens SIRIUS 3RT1054-1SP36 Power Contactor is a robust, high-performance 3-pole switching device engineered for the demanding control of powerful motors and industrial loads. Rated for 115 A (AC-3e/AC-3) and 55 kW at $400\text{V}$, this contactor is part of the modular SIRIUS system, offering exceptional reliability and a compact design for modern industrial automation systems.

A key feature is its advanced electronic AC/DC wide-voltage drive ($200-277\text{V}$) combined with a dedicated 24 V DC F-PLC input, making it ideal for safety-oriented applications requiring direct control from a failsafe PLC. The unit is pre-installed with 2 NO + 2 NC auxiliary contacts for versatile signaling and interlocking, and utilizes box terminals for the main circuit and screw terminals for control/auxiliary circuits for secure and easy installation.

Key Benefit

• Maximum Performance: High switching capacity of $115\text{A}$ and $55\text{kW}$ for heavy-duty motor control
• Safety Integration: Dedicated F-PLC Input ($24\text{V DC}$) allows direct, failsafe connection to modern automation controllers, enhancing system safety.
• Universal Application: Electronic drive supports a wide control voltage range of $\text{AC}(50-60\text{Hz})/\text{DC }200-277\text{V}$, simplifying inventory and maximizing application flexibility.
• Quick & Secure Wiring: Main circuit features robust Box Terminals, while control and auxiliary circuits use reliable Screw Terminals.
• Simplified Design: Pre-installed $2\text{NO}+2\text{NC}$ auxiliary contacts reduce complexity and component count.
• Global Standard: SIRIUS 3RT series is climate-resistant and approved for worldwide use (IEC, UL/CSA), and is $\text{IE3}/\text{IE4-ready}$.

Function

The Siemens 3RT1054-1SP36 Contactor functions as the critical link for switching three-phase loads. It is primarily used for the remote and automatic control of:

1. High-Power Electric Motors: Starting, stopping, and controlling the operation of motors in pumps, compressors, conveyors, and fans.
2. Motor Starters: Integral component in load feeders and motor starter combinations.
3. Resistive Loads: Switching of large heating elements and lighting systems in industrial environments.
4. Safety Circuits: Its F-PLC input makes it essential for integrating into emergency stop and safety-critical control loops, meeting modern machine safety standards.

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